T-Mobile last year eliminated roaming fees that can add up for customers who use their phone or data services in foreign countries. It also allows customers to upgrade their phones after just six months.

The latest move enables customers to trade in their smartphone for up to $300 in credit while collecting $350 for each line that comes with a termination fee.

T-Mobile’s offer comes after AT&T said it would offer a $200 credit to T-Mobile customers who switch. It also offered up to $250 for those customers who trade in their old phones.

Legere, who made the T-Mobile offer public at the Consumer Electronics Show in Las Vegas, said AT&T’s deal will benefit his company.

“If it doesn’t work, they’ll pay you to come back,” he said, according to The Huffington Post.

T-Mobile, the website reported, said it added nearly 1.7 million customers in the fourth quarter of 2013, up from a little more than 1 million net additional customers in the third quarter.